Merged revisions 74970 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r74970 | ronald.oussoren | 2009-09-20 16:18:15 +0200 (Sun, 20 Sep 2009) | 7 lines

  Issue 6877: this patch makes it possible to link the readline extension
  to the libedit emulation of the readline API on OSX 10.5 or later.

  This also adds a minimal testsuite for readline to check that the
  history manipuation functions have the same interface with both
  C libraries.
........

Lib/test/test_readline.py

@@ -0,0 +1,42 @@
+"""
+Very minimal unittests for parts of the readline module.
+
+These tests were added to check that the libedit emulation on OSX and
+the "real" readline have the same interface for history manipulation. That's
+why the tests cover only a small subset of the interface.
+"""
+import unittest
+from test.support import run_unittest
+
+import readline
+
+class TestHistoryManipulation (unittest.TestCase):
+    def testHistoryUpdates(self):
+        readline.clear_history()
+
+        readline.add_history("first line")
+        readline.add_history("second line")
+
+        self.assertEqual(readline.get_history_item(0), None)
+        self.assertEqual(readline.get_history_item(1), "first line")
+        self.assertEqual(readline.get_history_item(2), "second line")
+
+        readline.replace_history_item(0, "replaced line")
+        self.assertEqual(readline.get_history_item(0), None)
+        self.assertEqual(readline.get_history_item(1), "replaced line")
+        self.assertEqual(readline.get_history_item(2), "second line")
+
+        self.assertEqual(readline.get_current_history_length(), 2)
+
+        readline.remove_history_item(0)
+        self.assertEqual(readline.get_history_item(0), None)
+        self.assertEqual(readline.get_history_item(1), "second line")
+
+        self.assertEqual(readline.get_current_history_length(), 1)
+
+
+def test_main():
+    run_unittest(TestHistoryManipulation)
+
+if __name__ == "__main__":
+    test_main()